What to do after buying a stock: a quarterly business-review checklist

Check the transaction separately from the investment case#

Compare the broker's confirmation with the order you authorised: company, security, quantity, execution price, date, account and fees. Keep the record and contact the broker promptly if something is wrong. Review account statements too. Tax and recordkeeping requirements depend on your jurisdiction and account.

A correct trade confirmation does not establish that the investment was sensible. It confirms what was executed. The business case needs its own record.

Preserve what you knew when you bought#

Save the dated filings, valuation inputs, funding risks and reasons for the decision. Include the strongest competing explanation and the information you still lack.

In the preceding observation guide, fictional Northstar reported total quarterly revenue of US$480.000m and cooling-module revenue of US$50.000m. Three of five launch customers reordered, and two new customers bought. Module gross margin was 41.0%, compared with 39.0% company-wide. One customer provided 44.0% of module revenue.

Operating cash flow was US$56.000m, capital expenditure US$17.000m and free cash flow US$39.000m under the definition used here. Receivables were US$128.000m and diluted weighted-average shares 100.000m.

The saved question is whether demand can broaden while product margin, cash generation and per-share progress hold up. This is narrower and more useful than “the company has potential”.

Update a small set of measures#

At the next fictional quarterly report, compare the same definitions and periods:

The module now contributes about 11.7% of total revenue, up from 10.4%. Customer concentration is lower, but one customer still represents over a third of module sales. Six active customers also does not mean all five earlier customers stayed.

Receivables rose about 3.1%, slightly below revenue growth of 3.3%. That comparison alone cannot prove collections improved. Check the receivables notes and cash-flow explanation before making that claim.

Check whether the improvement reaches each share#

Free cash flow increases from US$39.000m to US$42.000m, or about 7.7%, because operating cash flow less capital expenditure is 60 minus 18 in the new quarter. Shares rise 2.0%; in this fictional example, employee equity awards explain most of the increase.

Using diluted weighted-average shares consistently, revenue per share rises from US$4.800 to approximately US$4.863, about 1.3%. Free cash flow per share rises from US$0.390 to approximately US$0.412, about 5.6%. These are analytical comparisons using a stated denominator, not reported earnings per share or standardised GAAP measures.

The growth is smaller per share than at company level. That does not decide whether the awards were worthwhile. It tells you where to examine the relationship between shareholder dilution and the value the spending supports.

Write what strengthened and what remains open#

An update might say:

Module sales, gross margin and free cash flow improved. Demand broadened, but one customer still contributes 36.0% of module revenue and one earlier customer did not return. Per-share growth is positive but lower than company growth. The next review should test whether this pattern continues and explain receivables and equity awards.

Append this to the original record. Do not replace the purchase-date reasoning. Keeping both makes it easier to notice a thesis that is gradually changing shape to accommodate disappointing facts.

Investigate price changes without guessing their cause#

Suppose Northstar's share price falls 4% with no confirmed explanation. Record the price change and the uncertainty. Check company disclosures, relevant industry events and broader market moves. An unverified social explanation should remain unverified.

The lower price changes valuation and the position's value. It does not automatically change module sales or prove the original business case failed. Similarly, a rising price cannot verify customer demand.

If the business case deteriorates, examine it directly using the thesis-review guide. Avoid using your purchase price as evidence of what the business is worth now.

Choose review triggers that match the question#

Investor-relations emails, regulatory filings and scheduled results can prompt a review. Price alerts serve a different purpose: they tell you the market price changed. Keep the alert set small enough that you can act on it.

A routine review can follow four tasks: confirm the source and period, update the measures, test the saved explanation, and write the next question. A thirty-minute timebox may help organise a straightforward update, but complex accounting or funding issues need more time.

Company monitoring also does not replace reviewing portfolio concentration, liquidity needs and your capacity for loss. A business can improve while the size of your holding becomes inappropriate for your circumstances.